Apparatus for making a bung ring



May 16, 1939- s. SCHWARTZ APPARATUS FOR MAKING A BUNG RING Original Filed Jan. 21, 1937 2 Sheets-Sheet l I lllllllll:

\Illlll Milly 1939. s. SCHWARTZ 2,158,434

APPARATUS FOR MAKING A BUNG RING Original Filed Jan. 21,1957 2 Sheets-Sheet 2 16 17 J4 J6 23 162 293,9 {0 J2 I! I i 1 i W I g I I 4 52 l H i HIH 4 "HI 25 28 IHII I 3 f H 3? 8 21 3 41 LII Patented May 16, 1939 UNITED STATE iilil'l QFFlCE Original application January 21, 1937, Serial No.

121,431. Divided and this application September 20, 1937, Serial No. 164,671

'7 Claims.

This invention relates to an apparatus for making a bung ring for a bushing structure and has special reference to an apparatus for making a hung ring for a bushing structure as employed 5 particularly in the construction of metal barrels andv other containers such as are used for storing or shipping oils or other liquids or semi-liquids, the bushing structure being adapted to receive a bung or other closure means in a fluid-tight l relation.

This application is a division of application Serial No. 121,431, filed by applicant on January 21, 1937, and which has issued into Patent No. 2,144,346, dated January 17, 1939.

The socket with which the bung ring is to be associated in the bushing structure is preferably formed outwardly from the material surrounding a hole in a supporting wall of the barrel or other container, the socket being either polygonal or circular in contour and initially having straight or substantially vertically extending side walls. The bushing structure in a completed state therefore comprises the combined bung ring and socket elements in which the opposite edges of a flange 95 of the bung ring are inwardly converged to be engaged by the side walls of the socket to hold the ring against displacement, the side walls being initially vertically formed to permit the entrance of the bung ring.

30 The present invention contemplates the provision of an apparatus for operating upon a connecting means or bung ring for receiving in a removable relation therewith a closure or bung, the connecting means being preferably formed of sheet material by the apparatus in the following manner: Forming a flange of polygonal contour on and at substantially right angles to the axis of a cylindrical collar in any usual manner, and in displacing the material of the flange about the polygonal periphery thereof to produce edges having a tapered relation with the main body portion of the flange. In other words, the material of the flange is so displaced that when viewed in cross section the edges of the flange converge in an inwardly direction toward the collar. The tapered edge thus produced affords a substantial surface over which the material of the socket may be formed to secure the bushing against dis placement.

In displacing the material of the flange about the polygonal perpihery thereof to produce inwardly converging edges when viewed in cross section, it is preferable to insert a radial pressure in a direction of the depth of the flange and toward the axis of the collar. In this method of forming the bushing, the inwardly converging edges are dished so that when the wall of the socket is formed thereagainst there is no tendency for the walls to spring away from the edges against which they are formed. Many advantages flow from the use of a sheet metal construction formed in the manner outlined above and these advantages generally have been set out in applicants copending application Serial No. 34,596, filed August 3, 1935, Patent No. 2,131,978, Gctober 4, 1938.

The present invention contemplates the provision of an apparatus for operating upon a bushing ringto displace the material of the flange thereof in a manner to produce inwardly converged dished edges when viewed in cross section, there being a plurality of pivotally mounted jaw members for operating upon the flange of the ring, the axes of the jaw members being spaced equidistantly from the central axis of the ring and having arcuate engaging faces eccentrically disposed with respect to the pivotal axes thereof.

Other objects and advantages of this invention will hereinafter be more particularly pointed out and for a more complete understanding of this invention, reference may now be had to the accompanying drawings when taken together with the following description, in which latter:

Figure 1 is a central vertical sectional view of the apparatus of this invention for operating upon a hung ring;

Fig. 2 is a view similar to Fig. 1 showing a changed position of the apparatus;

Fig. 3 is a View similar to Fig. 1 on an enlarged scale showing the final step in the operation;

Fig. 4 is a fragmentary plan sectional view taken on the line 4 l of Fig. 3;

Fig. 5 is a fragmentary sectional view showing a portion of the bushing ring and socket assembly;

Fig. 6 is a fragmentary elevational view from the underneath side of the bung ring;

Fig. 7 is a fragmentary side elevational view of the bushing ring of fig. 6;

Fig. 8 is a perspective view of one of the segmental pieces for receiving a trunnion of a jaw member employed for operating upon the bushing ring; and

Fig. 9 is a view of one of the jaw members, one trunnion of which is received in a recess of the segmental piece illustrated in Fig. 8.

ferring now to the drawings and more particularly to Figs. 1 to 4, inclusive, thereof, an apparatus is shown for operating upon the bushing ring to produce inwardly converging dished edges thereon when viewed in cross section, the apparatus being illustrated in the form of a punch member id for cooperation with a die member I I.

The punch holder it! comprises a plate l2 having a central recess E3 on one face thereof for receiving a substantially cup-shaped member M in frictional engagement therewith. A positioning member i5 is mounted within the cup-shaped member H5 and is held in position therein with respect to the plate 52 by means of a threaded bolt id or other suitable means. A shank ll of the punch holder l0 extends centrally of the plate I? and upwardly therefrom for engagement with the movable portion of a press, there being preferably a pair of knock-out rods [3 extending through the shank I? of the punch holder ill for engagement with the cup-shaped member 54 to displace the latter together with the positioning member l5 when it is desired to disassemble the punch. The plate l2 is also provided with a plurality oi bushings l9 having apertures 28 therethrough acting as guideways for cooperation with a guide rod 2! secured to and extending upwardly from a plate 22 of the die.

The die member ii comprises the plate which is preferably fixed to the bed of the press, a collar eing secured within a recess on the upper surface of the plate 22 by means of bolts 24. A base 25 is disposed within the ring 23 and is guided thereby in a vertical or axial movement thereof, the base 25 supporting a plurality of segmental pieces 2%.

Referring now more particularly to Figs. 4, 3, and 9, it will be noted that the segmental pieces 26 are provided in cooperating pairs, each pair being spaced and being provided with opposed recesses 2'! for receiving trunnions 28 of jaw members 29. Adjacent segmental pieces engage each other and are engaged by bolts 250. or similar means extending from the base 25 for pre venting displacement thereof and of the jaw members while, as above stated, cooperating pairs of segmental members are spaced to receive therebetween the trunnions 28 of the jaw members.

The base 25 is held in a normal inoperative extended position such as is shown in Fig. 1 by a resiliently supported member 3d operating through the spacing bolts 3i which engage threaded apertures in the bottom of the base its. A bushing ring holder 32 is resiliently supported by means of a compression spring 33 on the base 2% the holder having a reduced extension providing a seat to receive and to position a portion of the cylindrical neck 34 of the bushing ring 35. It will thus be seen that the bushing ring holder 32 is movable axially with respect to the base against the compression of the spring 33 and the base 25, in turn, is movable axially with respect to the fixed support or plate 22 and ring 2'3, there being a recess 36 in the plate 22 below the recess for the ring 23 to receive the base 25 in a lowered position.

A jaw member 29 is preferably provided for each of the flat sides of the polygonal flange of the bushing ring. Each of the jaw members is provided with an extension Bl for engagement with the fixed ring 23, the extensions preferably extending through apertures as in the ring. In this manner a relative movement between the base 25 and the ring 23 will operate the jaw members.

Each of the jaw members 29 is provided with an arcuate engaging face 250,, the radius for which is disposed off center relative to the axis of the trunnion or the axis about which the jaw members pivot. A pivotal movement in one direction of the jaw members moves the engaging faces radially inwardly and, of course, a pivotal movement of the jaw members in the opposite direction moves the engaging faces in a direction radially outwardly from each other. Thus the jaw members are said to have arcuate engaging faces eccentrically disposed with respect to the axes of the jaw members, the jaw members having their axes equidistantly spaced from the central axis of the apparatus. It is to be understood, however, that a pivotal movement of the jaws describes but one form of movement thereof although a slidable jaw or a jaw having other relative movement may be substituted therefor.

In the operation of the apparatus thus described, the initial and inoperative condition of the apparatus is shown in Fig. 1, the bushing ring holder 32 and the base 25 being fully extended by the action of the compression spring 33 and the resilient support 3i respectively. The bushing ring 35 is operated upon in a single operation although We will hereafter consider the successive steps in that single operation. In

Fig. 1 the jaw members are in a position such that that portion of the diametrically opposed engaging faces in position to operate upon the bung ring is at a maximum distance apart. A movement downwardly of the punch l0 and associated members to the position shown in Fig.

2, a reduced extension lea of the positioning member l5 fitting within the bushing ring 39, causes a movement of the bushing ring holder 32 against the tension of the spring 33 into engagement with the base 25, the resilient support.

38 being sufliciently strong to overcome the compression of the spring 33. This initial movement brings the bushing ring 35 into such a position that an initial engagement may be had on the flange thereof by the arcuate engaging faces of the jaw members.

A continued movement of the punch member ill in a downward direction overcomes the compression of the resilient support 30 and carries the base member 25 downwardly so that relative.

movement is had between the base and the fixed support or ring 23. A relative movement between the base for supporting the jaw members and the fixed support or ring 23 causes a pivotal movement of the jaw members 29 which, in turn,-

operates the arcuate engaging faces eccentrieally to shorten the distance between diametrically opposed spaces to displace the material of the flange 39 of the bung ring 35 to produce inwardly converging edges. gaging faces being arcuate, the converging edges are dished inwardly as shown more particularly in Fig. 5.

Referring now more particularly to Figs. 4 to 9, inclusive, it will be noted that not only have,

ployed in combination with a socket formed:

from the material of the barrel wall or other supporting body with which it is employed. In Fig. 5 the bung ring 35 is employed in combination with the outwardly directed socket 40, the

By reason of the en-,

wall ll of the socket being forced against thei inwardly converging dished edges or faces 42 of the polygonal sides of the flange 39 of the ring. By reason of the converging edge of the flange of the bushing ring being dished, there is not the same tendency for the material of the wall 3! of the socket to spring away from its engagement therewith after the jaws of a forming tool have urged the more or less resilient metal of the barrel thereagainst.

The dished faces 42, which converge inwardly when viewed in cross section, are preferably spaced and in this manner permit the material of the flange therebetween to remain as a straight edge. The normal point of intersection of the polygonal sides are somewhat rounded as at 43 to eliminate sharp edges. Also, the converging edges or faces begin on a line substantially spaced from the upper face of theflange, as indicated at A in Fig. 5, to likewise eliminate sharp edges. Such construction obviates the necessity of perfect positioning of the bung ring in the socket therefor and augments the normal action in preventing relative rotation therebetween.

While but a single embodiment of this invention is herein shown and described, it is to be understood that various modifications thereof may be apparent to those skilled in the art without departing from the spirit and scope of this invention and therefore the same is only to be limited by the scope of the prior art and the appended claims.

I claim:

1. An apparatus for operating upon a bushing ring to displace the material of the flange of the ring in a manner to produce inwardly converging dished edges when viewed in cross section, comprising a plurality of pivotally mounted jaw members, the axes of which are spaced equidistantly from the central axis of the ring, and means for pivoting said jaw members, said jaw members having arcuate engaging faces eccentrically disposed with respect to the axes thereof.

2. An apparatus for operating upon a bushing ring to displace the material of the flange of the ring in a manner to produce inwardly converging dished edges when viewed in cross section, comprising a plurality of pivotally mounted jaw members, the axes of which are spaced equidistantly from the central axis of the ring, extension means on said jaw members, and means engaging said extension means for pivoting said jaw members, said jaw members having arcuate engaging faces eccentrically disposed with respect to the axes thereof.

3. An apparatus for operating upon a bushing ring to displace the material of the flange of the ring in a manner to produce inwardly converging dished edges when viewed in cross section,comprising a plurality of jaw members having trunnions, spaced segmental pieces having opposed cooperating recesses for receiving said trunnions, the axes of said trunnions being equidistant from the central axis of the ring, and means for pivoting said jaw members, said jaw members having arcuate engaging faces eccentrically disposed with respect to the axes thereof.

4. An apparatus for operating upon a bushing ring to displace the material of the flange of the ring in a manner to produce inwardly converging dished edges when viewed in cross section, comprising a plurality of jaw members having trunnions, a movable support upon which said trunnions are pivotally mounted, a relatively fixed support upon which said movable support is mounted, means extending from said jaw members for engaging said fixed support whereby said jaw members are operated by relative movement between said fixed and movable supports, and means for moving said movable support, said jaw members having arcuate engaging faces eccentrically disposed with respect to the axes thereof and said axes being spaced equidistantly from the central axis of the ring.

5. An apparatus for operating upon a bushing ring to displace the material of the flange of the ring in a manner to produce inwardly converging dished edges when viewed in cross section, comprising a plurality of jaw members having trunnions, a movable support upon which said trun nions are pivotally mounted, a relatively fixed support upon which said movable support is resiliently mounted, means extending from said jaw members for engaging said fixed support whereby said jaw members are operated by relative movement between said fixed and movable supports, and means for moving said movable support, said jaw members having arcuate engaging faces eccentrically disposed with respect to the axes thereof and said axes being spaced equidistantly from the central axis of the ring.

6. An apparatus for operating upon a bushing ring of polygonal contour to displace the material of the flange of the ring in a manner to produce inwardly-converging dished edges when viewed in cross section, comprising a plurality of jaw members having trunnions, there being a jaw member for each face of the polygonal contour of the ring, a movable support upon which said trunnions are pivotally mounted, a relatively fixed support upon which said movable support is resiliently mounted, means extending from said jaw members for engaging said fixed support whereby said jaw members are operated by relative movement between said fixed and movable supports, and means for moving said movable support, said jaw members having arcuate engaging faces eccentrically disposed with respect to the axes thereof and said axes being spaced equidistantly from the central axis of the rin 7. An apparatus for operating upon a bushing ring to displace the material of the flange of the ring in a manner to produce inwardly converging edges when viewed in cross section, comprising a plurality of movably mounted jaw members spaced equidistantly from the central axis of the ring, and means for moving said members radially inwardly, said jaw members having engaging faces disposed eccentrically relative to the path of movement of said jaw members for operating upon the material of the flange of the bushing ring during such radial movement.

SOL SCHWARTZ. 

